There wasn't even any point in responding to Black's cruel worded jab, and frankly he wasn't even sure he could have found the words he needed to respond, he was so busy drowning in anger and hurt; the sharp kind that he thought he'd buried years ago behind a layer of quiet disdain and indifference.
He flicked his wand to throw off whatever spell Sirius was casting just a little too late, and being knocked back on his ass with magic was its own kind of pain, not only for how they were stuck to each other. But it didn't matter, it really didn't, it could hurt forever but he wasn't the one bleeding bright red through his clothing. "I know enough to know you deserved more than Azkaban," he hissed, low.